I am currently preparing for my first round interviews at MBB. During most case interviews I encountered mid-case questions and I was wondering which holistic frameworks exist to approach those questions in a structured manner e.g. a value chain to identify possible cost improvements or meta-structures like "internal vs. external". I am not reffering to the standard frameworks like 4P, Ansoff, etc. Maybe there is a list on the most common structures to use.
Thanks in Advance!